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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1">
<title>libcoyotl</title>
<link href="doxygen.css" rel="stylesheet" type="text/css">
</head><body bgcolor="#ffffff">
<h1 align="center" color="#606080">
libcoyotl - A Library of C++ Tools
</h1>
<p align="center">
Created by <a href="mailto:scott.ladd@@coyotegulch.com?subject=libcoyotl">Scott Robert Ladd</a> at
<a href="http://www.coyotegulch.com">Coyote Gulch Productions</a>.
</p>
<hr>
<!-- Generated by Doxygen 1.8.9.1 -->
<div id="nav-path" class="navpath">
  <ul>
<li class="navelem"><b>libcoyotl</b></li><li class="navelem"><a class="el" href="a00016.html">prng</a></li>  </ul>
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<div class="header">
  <div class="summary">
<a href="#pub-methods">Public Member Functions</a> &#124;
<a href="#pro-attribs">Protected Attributes</a> &#124;
<a href="a00049.html">List of all members</a>  </div>
  <div class="headertitle">
<div class="title">libcoyotl::prng Class Reference<span class="mlabels"><span class="mlabel">abstract</span></span></div>  </div>
</div><!--header-->
<div class="contents">

<p>An abstract definition of a peudorandom number generator.  
 <a href="a00016.html#details">More...</a></p>

<p><code>#include &lt;<a class="el" href="a00030_source.html">prng.h</a>&gt;</code></p>
<div class="dynheader">
Inheritance diagram for libcoyotl::prng:</div>
<div class="dyncontent">
 <div class="center">
  <img src="a00016.png" usemap="#libcoyotl::prng_map" alt=""/>
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<area href="a00004.html" title="Implements CMWC4096, a peudorandom number generator. " alt="libcoyotl::cmwc4096" shape="rect" coords="0,56,125,80"/>
<area href="a00007.html" title="Implements KISS, a peudorandom number generator. " alt="libcoyotl::kissrng" shape="rect" coords="135,56,260,80"/>
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 </div></div>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr class="memitem:a1d1a1883b72b5324fd8dcc17703a444d"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00016.html#a1d1a1883b72b5324fd8dcc17703a444d">prng</a> ()</td></tr>
<tr class="memdesc:a1d1a1883b72b5324fd8dcc17703a444d"><td class="mdescLeft">&#160;</td><td class="mdescRight">Default constructor, reading seed from/dev/urandom or the time.  <a href="#a1d1a1883b72b5324fd8dcc17703a444d">More...</a><br /></td></tr>
<tr class="separator:a1d1a1883b72b5324fd8dcc17703a444d"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ae069785fe18c74f7bb921a994d3421ba"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00016.html#ae069785fe18c74f7bb921a994d3421ba">prng</a> (uint32_t seed)</td></tr>
<tr class="memdesc:ae069785fe18c74f7bb921a994d3421ba"><td class="mdescLeft">&#160;</td><td class="mdescRight">Default constructor, with optional seed.  <a href="#ae069785fe18c74f7bb921a994d3421ba">More...</a><br /></td></tr>
<tr class="separator:ae069785fe18c74f7bb921a994d3421ba"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:abd4a242a9b7e372173a01034003a4011"><td class="memItemLeft" align="right" valign="top">virtual void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00016.html#abd4a242a9b7e372173a01034003a4011">init</a> (uint32_t seed)</td></tr>
<tr class="memdesc:abd4a242a9b7e372173a01034003a4011"><td class="mdescLeft">&#160;</td><td class="mdescRight">Initializes the generator with "seed".  <a href="#abd4a242a9b7e372173a01034003a4011">More...</a><br /></td></tr>
<tr class="separator:abd4a242a9b7e372173a01034003a4011"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a1fd02ff9bb731cd3b3b34152bad64588"><td class="memItemLeft" align="right" valign="top">uint32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00016.html#a1fd02ff9bb731cd3b3b34152bad64588">get_seed</a> ()</td></tr>
<tr class="memdesc:a1fd02ff9bb731cd3b3b34152bad64588"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns the original seed value.  <a href="#a1fd02ff9bb731cd3b3b34152bad64588">More...</a><br /></td></tr>
<tr class="separator:a1fd02ff9bb731cd3b3b34152bad64588"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a52c378672859cbf3a60f1d744e526201"><td class="memItemLeft" align="right" valign="top">virtual uint32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00016.html#a52c378672859cbf3a60f1d744e526201">get_rand</a> ()=0</td></tr>
<tr class="memdesc:a52c378672859cbf3a60f1d744e526201"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get the next integer.  <a href="#a52c378672859cbf3a60f1d744e526201">More...</a><br /></td></tr>
<tr class="separator:a52c378672859cbf3a60f1d744e526201"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ab6f1da8479a19f00b4bba9dc0e5edaea"><td class="memItemLeft" align="right" valign="top">uint32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00016.html#ab6f1da8479a19f00b4bba9dc0e5edaea">get_rand_range</a> (uint32_t lo, uint32_t hi)</td></tr>
<tr class="memdesc:ab6f1da8479a19f00b4bba9dc0e5edaea"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get the next integer in the range [lo,hi].  <a href="#ab6f1da8479a19f00b4bba9dc0e5edaea">More...</a><br /></td></tr>
<tr class="separator:ab6f1da8479a19f00b4bba9dc0e5edaea"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:adabd93b71e6116671bfe44137a75da04"><td class="memItemLeft" align="right" valign="top">size_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00016.html#adabd93b71e6116671bfe44137a75da04">get_rand_index</a> (size_t length)</td></tr>
<tr class="memdesc:adabd93b71e6116671bfe44137a75da04"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get the next random value as a size_t index.  <a href="#adabd93b71e6116671bfe44137a75da04">More...</a><br /></td></tr>
<tr class="separator:adabd93b71e6116671bfe44137a75da04"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:acec3bc772e076505c38c0c66076665cf"><td class="memItemLeft" align="right" valign="top">double&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00016.html#acec3bc772e076505c38c0c66076665cf">get_rand_real1</a> ()</td></tr>
<tr class="memdesc:acec3bc772e076505c38c0c66076665cf"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get the next number in the range [0,1].  <a href="#acec3bc772e076505c38c0c66076665cf">More...</a><br /></td></tr>
<tr class="separator:acec3bc772e076505c38c0c66076665cf"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a1fa4bf05a31903239d4cf083c35c8dae"><td class="memItemLeft" align="right" valign="top">double&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00016.html#a1fa4bf05a31903239d4cf083c35c8dae">get_rand_real2</a> ()</td></tr>
<tr class="memdesc:a1fa4bf05a31903239d4cf083c35c8dae"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get the next number in the range [0,1)  <a href="#a1fa4bf05a31903239d4cf083c35c8dae">More...</a><br /></td></tr>
<tr class="separator:a1fa4bf05a31903239d4cf083c35c8dae"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a03fa0420cd8f742632e708e27b492f44"><td class="memItemLeft" align="right" valign="top">double&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00016.html#a03fa0420cd8f742632e708e27b492f44">get_rand_real3</a> ()</td></tr>
<tr class="memdesc:a03fa0420cd8f742632e708e27b492f44"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get the next number in the range (0,1)  <a href="#a03fa0420cd8f742632e708e27b492f44">More...</a><br /></td></tr>
<tr class="separator:a03fa0420cd8f742632e708e27b492f44"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:af80ba5cfd944c92705edf15eef02be3b"><td class="memItemLeft" align="right" valign="top">double&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00016.html#af80ba5cfd944c92705edf15eef02be3b">get_rand_real53</a> ()</td></tr>
<tr class="memdesc:af80ba5cfd944c92705edf15eef02be3b"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get the next number in the range [0,1)  <a href="#af80ba5cfd944c92705edf15eef02be3b">More...</a><br /></td></tr>
<tr class="separator:af80ba5cfd944c92705edf15eef02be3b"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pro-attribs"></a>
Protected Attributes</h2></td></tr>
<tr class="memitem:a826e46bea2a763c276dd9aeacceea4e2"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a826e46bea2a763c276dd9aeacceea4e2"></a>
uint32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00016.html#a826e46bea2a763c276dd9aeacceea4e2">m_seed</a></td></tr>
<tr class="memdesc:a826e46bea2a763c276dd9aeacceea4e2"><td class="mdescLeft">&#160;</td><td class="mdescRight">Initialization seed. <br /></td></tr>
<tr class="separator:a826e46bea2a763c276dd9aeacceea4e2"><td class="memSeparator" colspan="2">&#160;</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>This class defines the generic properties of any psuedo-random number generator that returns a 32-bit unsigned result. </p>
</div><h2 class="groupheader">Constructor &amp; Destructor Documentation</h2>
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          <td>(</td>
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<p>The constructor initializes the prng seed from either the time or some stochastic source such as /dev/random or /dev/urandom. </p>

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          <td class="memname">libcoyotl::prng::prng </td>
          <td>(</td>
          <td class="paramtype">uint32_t&#160;</td>
          <td class="paramname"><em>seed</em></td><td>)</td>
          <td></td>
        </tr>
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<p>Starts the PRNG with a specific seed; this is provided so that a given sequence of "random" values can be duplicated. Note that the actual sequence is predicated on the specific PRNG algorithm. </p><dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">seed</td><td>- Seed value used to "start" or seed the generator </td></tr>
  </table>
  </dd>
</dl>

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<h2 class="groupheader">Member Function Documentation</h2>
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          <td class="memname">virtual uint32_t libcoyotl::prng::get_rand </td>
          <td>(</td>
          <td class="paramname"></td><td>)</td>
          <td></td>
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<p>Returns the next uint32_t in sequence. </p><dl class="section return"><dt>Returns</dt><dd>A pseudorandom uint32_t value </dd></dl>

<p>Implemented in <a class="el" href="a00012.html#a92cd5111e9bb16b4c3addea8f73c698d">libcoyotl::mwc1038</a>, <a class="el" href="a00011.html#af8c9213cc1199b3c55c128c55a676ce5">libcoyotl::mtwister</a>, <a class="el" href="a00004.html#a42b3f3096a86e8e51827c14a1afdc9bb">libcoyotl::cmwc4096</a>, <a class="el" href="a00013.html#a521c6421843ea13e5d6ed09cd7c5140c">libcoyotl::mwc256</a>, and <a class="el" href="a00007.html#aa96a8a6fe92f2b1b66b131845ddb8445">libcoyotl::kissrng</a>.</p>

<p>Referenced by <a class="el" href="a00016.html#acec3bc772e076505c38c0c66076665cf">get_rand_real1()</a>, <a class="el" href="a00016.html#a1fa4bf05a31903239d4cf083c35c8dae">get_rand_real2()</a>, and <a class="el" href="a00016.html#a03fa0420cd8f742632e708e27b492f44">get_rand_real3()</a>.</p>

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          <td class="memname">size_t libcoyotl::prng::get_rand_index </td>
          <td>(</td>
          <td class="paramtype">size_t&#160;</td>
          <td class="paramname"><em>length</em></td><td>)</td>
          <td></td>
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<p>Returns the next value as a size_t "index" in the range [0,length). </p><dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">length</td><td>- Maximum value of result </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>A pseudorandom size_t value </dd></dl>

<p>References <a class="el" href="a00016.html#a1fa4bf05a31903239d4cf083c35c8dae">get_rand_real2()</a>.</p>

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          <td>(</td>
          <td class="paramtype">uint32_t&#160;</td>
          <td class="paramname"><em>lo</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">uint32_t&#160;</td>
          <td class="paramname"><em>hi</em>&#160;</td>
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<p>Returns the next int_value between lo and hi, inclusive. </p><dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">lo</td><td>- Minimum value of result </td></tr>
    <tr><td class="paramname">hi</td><td>- Maximum value of result </td></tr>
  </table>
  </dd>
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<dl class="section return"><dt>Returns</dt><dd>A pseudorandom uint32_t value </dd></dl>

<p>References <a class="el" href="a00016.html#a1fa4bf05a31903239d4cf083c35c8dae">get_rand_real2()</a>.</p>

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<p>Returns the next real number in the range [0,1], i.e., a number greater than or equal to 0 and less than or equal to 1. Provides 32-bit precision. </p><dl class="section return"><dt>Returns</dt><dd>A pseudorandom double value </dd></dl>

<p>References <a class="el" href="a00016.html#a52c378672859cbf3a60f1d744e526201">get_rand()</a>.</p>

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          <td class="memname">double libcoyotl::prng::get_rand_real2 </td>
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<p>Returns the next real number in the range [0,1), i.e., a number greater than or equal to 0 and less than 1. Provides 32-bit precision. </p><dl class="section return"><dt>Returns</dt><dd>A pseudorandom double value </dd></dl>

<p>References <a class="el" href="a00016.html#a52c378672859cbf3a60f1d744e526201">get_rand()</a>.</p>

<p>Referenced by <a class="el" href="a00016.html#adabd93b71e6116671bfe44137a75da04">get_rand_index()</a>, and <a class="el" href="a00016.html#ab6f1da8479a19f00b4bba9dc0e5edaea">get_rand_range()</a>.</p>

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<p>Returns the next real number in the range (0,1), i.e., a number greater than 0 and less than 1. Provides 32-bit precision. </p><dl class="section return"><dt>Returns</dt><dd>A pseudorandom double value </dd></dl>

<p>References <a class="el" href="a00016.html#a52c378672859cbf3a60f1d744e526201">get_rand()</a>.</p>

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<p>Returns the next real number in the range [0,1), i.e., a number greater than or equal to 0 and less than 1. Provides 53-bit precision. </p><dl class="section return"><dt>Returns</dt><dd>A pseudorandom double value </dd></dl>

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<p>Returns the seed value used to initialize this generator. </p><dl class="section return"><dt>Returns</dt><dd>The seed value used to initialize this generator </dd></dl>

<p>References <a class="el" href="a00016.html#a826e46bea2a763c276dd9aeacceea4e2">m_seed</a>.</p>

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          <td class="memname">virtual void libcoyotl::prng::init </td>
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<p>Resets the generator using the provided seed value. </p><dl class="params"><dt>Parameters</dt><dd>
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    <tr><td class="paramname">seed</td><td>- Seed value used to "start" or seed the generator </td></tr>
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<p>Reimplemented in <a class="el" href="a00012.html#ab5d5e9534e521000401a105354256edb">libcoyotl::mwc1038</a>, <a class="el" href="a00011.html#a32a0469c8df1552d532ba98a9af3d2d9">libcoyotl::mtwister</a>, <a class="el" href="a00004.html#af196da55ca3bd914d23d2af927470bd2">libcoyotl::cmwc4096</a>, <a class="el" href="a00013.html#abf8584c30214a9ad3e4ed748ee12eb5f">libcoyotl::mwc256</a>, and <a class="el" href="a00007.html#aa5d737b23bd390c9462f7e5a5df39a54">libcoyotl::kissrng</a>.</p>

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<hr/>The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="a00030_source.html">prng.h</a></li>
</ul>
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